63402879 has 4 divisors (see below), whose sum is σ = 84537176. Its totient is φ = 42268584.

The previous prime is 63402869. The next prime is 63402901. The reversal of 63402879 is 97820436.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 63402879 - 2⁴ = 63402863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63402869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10567144 + ... + 10567149.

It is an arithmetic number, because the mean of its divisors is an integer number (21134294).

Almost surely, 2^63402879 is an apocalyptic number.

63402879 is a deficient number, since it is larger than the sum of its proper divisors (21134297).

63402879 is a wasteful number, since it uses less digits than its factorization.

63402879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21134296.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 63402879 is about 7962.5924798397. The cubic root of 63402879 is about 398.7521088845.

The spelling of 63402879 in words is "sixty-three million, four hundred two thousand, eight hundred seventy-nine".